Office chair



FIG. 1 is a perspective view of a office chair showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a right view thereof.

The bottom of the office chair has not been shown and forms no part ofthe claimed design.

The ornamental design for office chair, as shown and described.